Ultimecia did not give birth to Sephiroth; they are from different game universes. Ultimecia is a character from "Final Fantasy VIII," while Sephiroth is from "Final Fantasy VII." Their stories and origins are distinct, with Sephiroth being born from the character Lucrecia Crescent, and Ultimecia being a sorceress from the future. Therefore, there is no connection between them regarding parentage.
Ultimecia does not give birth to Sephiroth in the Final Fantasy series; this is a common misconception. Sephiroth is actually the son of Lucrecia Crescent and Hojo, a scientist from Shinra. Ultimecia is a powerful sorceress from Final Fantasy VIII and has no direct connection to Sephiroth, who is a character from Final Fantasy VII. Each character and their stories belong to separate narratives within the Final Fantasy franchise.
Short answer: NO!
probably sephiroth.
Sephiroth is the hardest to beat.
Sephiroth's father is Hojo, a famous scientist who is in Final Fantasy 7 and Final Fantasy 7 Crisis Core, and his mother is Lucrecia Crescent, who worked with him on the Jenova project.
No. Sephiroth's mother's name is Lucrecia Crescent. She became pregnant with Sephiroth while she worked on the Jenova project, along with the father, Professor Hojo, and agreed to allow her unborn child to be used as a test subject.
Necron always starts with 54,100 HP, his HP is not variable, unlike say, Sephiroth or Ultimecia.
She didn't... Sephiroth got Created by an experiment by Hojo.
No, they are from different games and have nothing to do with each other.
No, she is not. You will find out who Ultimecia is near the end of the game
Fenrir
No, Jenova is an alien from outerspace. Kefka and Ultimecia are both wizard/witch.